side effects may include headache, upset stomach, delayed backache or muscle ache. to avoid long-term injury, seek immediate medical help for an erection lasting more than four hours. if you have any sudden decrease or loss in hearing or vision, or if you have any allergic reactions such as rash, hives, swelling of the lips, tongue or throat, or difficulty breathing or swallowing, stop taking cialis and get medical help right away. ask your doctor about cialis for daily use and a 30-tablet free trial. help the gulf when we made recover and learn the gulf, bp from what happened so we could be a better, safer energy company. i can tell you - safety is at the heart of everything we do. we've added cutting-edge technology, like a new deepwater well cap and a state-of-the-art monitoring center, whe experts watch over all drilling activity twenty-four-seven. and we're sharing what we've learned, so we can all produce energy more safely. our commitment has never been stronger.